PDF malware analysis — malicious · 690b6f584f2faf8a

MALICIOUS

PDF

159.1 KB Created: 2021-09-17 12:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7a2fb68919324894df0b6ccaeae87f76 SHA-1: d4a349a12a9e7029e3be044a0f7edb2a2525e61a SHA-256: 690b6f584f2faf8a4bf8df476382b8bb0b5f401bb03ba9aa9f20482a4a1096db

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, a common tactic for malware distribution. The numerous external URLs suggest a link farm or redirection infrastructure used to host or serve malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://coretry.ru/uplcv?utm_term=minecraft+mobile+connect+to+pc+server PDF link annotation
- https://ekselantechnology.solutions/ckfinder/userfiles/files/fomiletizibufajanagovuz.pdfIn PDF document text
- http://massiimo.com/piceditor/file/rukovalegudurekid.pdfIn PDF document text
- https://war-old.its.vn/new/userfiles/file/peleloniraw.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea2bd2a28---sinijone.pdfIn PDF document text
- http://xn--tnqz8hz5cb8l.com/upload/files/51691229502.pdfIn PDF document text
- http://medicare-darmstadt.de/bilder/UserImages/file/toburazurifil.pdfIn PDF document text
- http://yongchengtech.com/uploads/files/202109050643214357.pdfIn PDF document text
- https://reparationmobile.net/userfiles/file/dogurivariwom.pdfIn PDF document text
- http://poorclarescork.ie/images/62697609763.pdfIn PDF document text
- https://bi-kiesabbau.de/cmsimple/images/file/batogelisaxovuzesurowax.pdfIn PDF document text
- http://hunicorn.hu/userfiles/file/89539928002.pdfIn PDF document text
- http://residencecarlofelice.com/userfiles/files/69636143824.pdfIn PDF document text
- https://autosaloncenter.com/uploads/file/fojadobemabol.pdfIn PDF document text
- https://sarvodayasamaj.uk/upload/files/zefebim.pdfIn PDF document text
- http://lignumweb.com/site/webroot/uploads/files/55700127453.pdfIn PDF document text
- https://tessuno.com/upload/files/613a3e1204461.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/2035566955.pdfIn PDF document text
- http://profstil.az/userfiles/file/92207663878.pdfIn PDF document text
- http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210902172104.pdfIn PDF document text
- http://showpelec.com/data/file/20210904_175554_208.pdfIn PDF document text
- https://ofcourselc.com/admin/uploadsfile/26195351289.pdfIn PDF document text
- http://farmaciafici.com/userfiles/files/56514785521.pdfIn PDF document text
- https://plewmal-d.com/Uploads/files/zogibipolorapirif.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00020103.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20103	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00021915.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21915	22776 bytes
SHA-256: `063d61271351e397497fcfe2aa11675342ee2377ae8ace6857df1042aeea6c60`
`font_02_sfnt_off0002553e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2553E	10840 bytes
SHA-256: `e02ebe43ac8bdb105c9484772d3bda546a9750dee31a7434ab663a24d79800d9`

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